I'm doing a research on web search usability and interface design for search. I already have a website to exemplify, which is a sort of search engine for cars.

The search form is important in the website, and it's a very popular type of navigation for any automobile site. I want to find relevant theory to this type of search, where you don't specify free text, but rather you choose the different categories (make, model, year, km, engine size, body type, etc..).

What is this type of search called and where can I find more academic papers / articles to reference?

I found a really good online book on search UI, but unfortunately I couldn't find any relevant parts about my type of search: Search User Interfaces Book

Other names that came close to what I'm looking, but still no relevant theory are:

faceted search - this one is more oriented to narrowing down the results after doing the text search

scoped search - combines free text and scope to limit to a specific subset of the database